hi all, first post any one give me info about leaf burn from spectra 500 led im in a 4x4 tent 1 light and soil loosing dark green color and turning yellow cycle is 20/4 distance is 36' from top of plants
Are you sure the burn is from the light? It sounds like nute-burn if the light is 36" away (way too far) from the plants.
Disclaimer: I still use HID and I'm NOT an LED expert. All of my LED knowledge is from other parties or research so I can't say from first hand experience one way or another. I also run a medical grow consulting business in SoCal.
I don't know much, but I agree with previous poster... Sounds like your plants are a bit far and maybe nutes... or adjust the pH??? yellow leaves can also mean over watering....
I find rather than judge by the surface being dry, cuz Medicine puts roots so deep, that I will give the pot a bit of a heft. If she's heavy, there's enough water in there, if she's light, she's thirsty. You get used to the feel of the weight and can judge it pretty good i think!
Hope this helps (or if I'm totally wrong PLEEZ somebody tell me so!)